Low-Power, Slew-Rate-Limited
RS-485/RS-422 Transceivers
MAX481/MAX483/MAX485/MAX487–MAX491/MAX1487
A
RO
RE
DE
Z
DI
Y
120Ω
120Ω
Z
DE
B
120Ω
120Ω
Y
Z
B
A
Y
Z
B
A
A
RE
RO
R
B
D
DI
D
Y
R
R
D
D
R
MAX489
MAX491
DE RE RO
DI
DE RE RO
DI
NOTE: RE AND DE ON MAX489/MAX491 ONLY.
Figure 22. MAX488–MAX491 Full-Duplex RS-485 Network
Isolated RS-485
MAX488–MAX491
A
RO
RE
DE
DI
For isolated RS-485 applications, see the MAX253 and
MAX1480 data sheets.
R
120Ω
B
DATA IN
Z
D
120Ω
Y
DATA OUT
NOTE: RE AND DE ON MAX489/MAX491 ONLY.
Figure 23. Line Repeater for MAX488–MAX491
14
______________________________________________________________________________________